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Sulfur-vacancy-containing MoS2 nanosheet and preparation method thereof

A technology of nanosheets and vacancies, applied in the field of image processing, can solve the problems of increasing energy consumption and danger, and achieve the effect of method cleaning

Inactive Publication Date: 2019-03-12
SHANDONG UNIV OF SCI & TECH
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  • Summary
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, most of the existing methods for introducing vacancies into catalysts rely on hydrogen reduction and active metal reduction methods under high temperature and pressure, which greatly increases the energy consumption and danger in the synthesis process.

Method used

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  • Sulfur-vacancy-containing MoS2 nanosheet and preparation method thereof
  • Sulfur-vacancy-containing MoS2 nanosheet and preparation method thereof
  • Sulfur-vacancy-containing MoS2 nanosheet and preparation method thereof

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Experimental program
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Embodiment

[0024] MoS with sulfur vacancies 2 The preparation method of nanosheet is as follows:

[0025] Laser preparation of MoS with sulfur vacancies 2 The nanosheet first needs to synthesize the precursor MoS 2 For nanosheets, dissolve 50mg of ammonium molybdate and 100mg of thiourea in 30ml of deionized water and stir continuously until a uniform solution is formed. Then the solution was transferred to a 50ml reactor and reacted at 260°C for 4h. Then the temperature was lowered to room temperature, and the product was washed with water several times and freeze-dried for 24 hours to obtain the precursor MoS 2 Nanosheets. MoS with sulfur vacancies 2 Nanosheets were obtained by laser liquid phase ablation. Use nanosecond pulsed laser Dawa-350 with a pulse width of 7ns and a power density of 1.8*10 6 W cm -2 . Take 1mg precursor MoS 2 The nanosheets were dispersed in 3ml ethanol and irradiated with nanosecond laser at room temperature for 10min. The obtained product was washe...

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Abstract

The invention provides a preparation method for a sulfur-vacancy-containing MoS2 nanosheet. The preparation method comprises the following steps of step 1: synthesizing a MoS2 nanosheet precursor; step 2: performing nanosecond laser irradiation on the precursor by using a laser liquid-phase ablation method; step 3: after freeze-drying a product of the nanosecond laser irradiation, finally acquiring the sulfur-vacancy-containing MoS2 nanosheet. The method for laser-synthesizing the sulfur-vacancy-containing MoS2 nanosheet has the advantages of being clean, rapid, and efficient, and has the incomparable advantages over a traditional method.

Description

technical field [0001] The invention relates to the technical field of image processing, in particular to a sulfur-vacancy MoS 2 Nanosheets and methods for their preparation. Background technique [0002] Due to the limited reserves of fossil energy and the environmental pollution caused by combustion, clean and green hydrogen energy is considered to be the most ideal substitute for fossil energy. Hydrogen production by electrolysis of water (HER), a green and efficient method for converting hydrogen energy, has very significant application prospects. Among the current HER catalysts, noble metal platinum-based catalysts have excellent catalytic performance, but their high cost limits their application in industrial production. Therefore, non-noble metal catalysts, especially molybdenum disulfide, have attracted extensive attention due to their good catalytic stability in acidic electrolytes and abundant surface reserves. However, due to the problems of low catalytic activ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/051C01G39/06
CPCB01J27/051C01G39/06
Inventor 周玥孟超杜希文
Owner SHANDONG UNIV OF SCI & TECH